Whats your point?
Nothing, just that it might be interesting for you. You might find out that you're actually an Udmurt after all. Or who knows, maybe even a Bashkir... I remember one Russian historian I read about claimed that the Romanov dynasty were descended from Khazars. He was of course a very controversial fellow.
Americans in general are kinda like this, though. Many of us have very mixed heritages, and the United States is the only thing we really have as a proper national identity anymore. For me the idea of the United States splintering is just...weird. Sure, there are regions that it could be broken up into, but it'd always feel a bit artificial. Especially since the past few generations have been extremely mobile and you have a lot less of the 'My family has lived in this town for hundreds of years' sort of thing. I mean, my own family (aunts, uncles, cousins) are scattered all across the US and I myself have lived in 4 different states covering 3 of the 4 corners of the country. I don't even properly identify with a region of the US, let alone a specific state.
I don't know if the USSR had much mobility like that, but if it did I can see how some people would find grabbing onto any single national identity to be difficult.
I think the main difference is that the USA is a very artificial state constructed on land literally taken from the Natives. Even though there's been talk of a Republic of Lakotah, it would be very difficult for the remaining Native Americans to attempt anything like that, and most prefer to fight for their rights within the USA. Or so it seems to me.
The Russian Federation on the other hand, even though most of it is constructed on land stolen from natives just like in the USA, is explicitly a federation of entities including ethnic "Republics", almost like little statelets with "titular nationalities". That is very different from the USA where New York or Oregon wouldn't have something like a "titular nationality". There's no "State of Lakotah", for instance.
This means though that in Russia there are actually little European-Style "nations" with their own governments. Toothless, but the illusion is there.